Incubator



(NO Model.) 2 Sheets-Sheet 1.

J. M. H. SPOONER. INGUBATOR.

N0. 508,492. Patented NOV. 14.-, 1893.-

(No Model.) 2 Sheets-Sheet 2.

J. M. H. SPOONER. INGUBATOR.

No. 508,492. Patented NOV. 14, 1893.

\|\1 Q, SX

WITNESSES Q u @wyf/'W 7 f WM MM@ .HilorneJ/s. I

me NAnnNAL Lrmoaruwmxa ca MMMM Y.

lTo all whom it may concern:

whicheinen.

Aralar JAMES M. H. SPOONER, OF DETROIT, MICHIGAN.

`mcueA-Ton.

SPECIFICATION forming part of Letters Patent No. 508,492, dated November 14, 1893.

Application med nach 31. 189s.

w Be it known that I, JAMES M. H. SPooNER, a citizen of theUn'ited States, residing at De-` troit, in the county of Wayne, State of Michigan, have invented certain new and useful Improvements in Incubators; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it'appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which forni a part of this specication.

This invention relates to new and useful improvements in incubatore, and consists in a certain construction and arrangement of parts, as hereinafterl fully set forth, the essential features of whichare pointed out particularly in the claim.

The objects of the invention are, to produce an incubator of simple construction, in which a perfect circulation of the heating agent is attained thereby insuring a uniform temperature in all parts of the incubatory chamber duringthe period of incubation, and in which provision is made for automatically regulating said temperature.

The objects are attained by the mechanism illustrated in the accompanying drawings, in

Figure l is a general perspective view of the incubator,with the outer door swung down. Fig.2 is an enlarged vertical section through the incubator, and the heating apparatus. Fig. 3 is an enlarged perspective of the heating apparatus. Fig. 4 is a vertical transverseV section through the incubator.

Referring to the letters of reference, A designates a suitable case or cabinet having the incubatory chamber B, access to which is afforded, through the outer hinged door O, and the inner glass door C', shown in Fig. -l. Upon the bottom of said chamber are the moisture pans D, and above said pansare supported the trays E, that are adapted to contain the eggs.

Located in the top of the cabinet is a water` tank F, which forms the ceiling of chamber B.

G designates a heating drum which is secured to one end of the cabinet, and provided with a central vertical fiue therethrough. The lower end of said drum is formed slightly tapering, and is adapted to receive the burner Serial No. 468,614.V (No model.)

of a lamp G', which is supported upon a swinging bracket h. The body portion of said drum is hollow being formed of double walls with a water space g, between them, as shown in Fig. 2.' The inner wall t, inclines slightly inward thereby reducing the opening through the drum at its upper end. The cap portion of the drum is provided with a water space H, which is separated from the space g in the vbody ot' the drum by an interposed air-space water therein when said tank is filled. These pipes are open at each end, their outer ends communicating with the water-space H in the heater, and their inner ends with the interior of said tank, as shown in Figs. 2 and 3. The outer ends of said pipes .T pass out of the tank through a partition b, which separates the water in the tank F, from the water in the closed chamber K, which isinterposed between said `tank and the water space H,-with which latter said chamber communicates. The inner ends of said pipes discharge into said tank at a point farthest from the heater, whereby the .Water in said tank is maintained at a uniform heat. Communicating with the end of the tank F, adjacent to the heater, is a pipe L, which extends obliquely downward, and discharges into the base of the water-space g in said heater. Some distance above said pipe and running parallel therewith, is a Second pipe M, which connects the water space g of the heater with the water chamber K. It will be apparent, that, by means of the construction above described, the water in space H of the heater, will become more quickly heated because of the concentration of heat at that point, caused by arresting the caloric current through the contraction of the central flue at its upper end. The water, so heated, flows out through the pipes J and traversing said pipes, discharges into the water in tank F, as before stated. To supply this How, the return Water from the tank passes downward through pipe L, to the water space g in the heater, and becoming heated, flows upward through pipe M to the chamber K, and out of said chamber into the upper Water space H, thence out through the pipes J, thus making a complete circulation.

The temperature of the incubatory chamber B is regulated by means of adamper c, located in the Ventilating flue O, clearly shown in Figs. 2 and 4. Said damper is pivotally mounted in said due, and is provided with a Weighted arm d, which normally holds said damper closed. Crossing theinterior of said chamber is a non-expansible bar P, upon which is supported a strip of metal e, highly susceptible to changes of temperature. This strip of metal; is rmly secured at each end, but is free at its center, at which point it is coupled to a leverf, pivoted to the bar P, the opposite end of said lever being coupled to a rod i', which is attached to the damper c. By this arrangement, should the heat in the chamber B become too great, the expansion of the strip e will cause it to buckle at the center, and actuate the leverfso as to draw upon the rodt'and open the damper c. The falling of the temperature in the chamber B, caused bythe escape of the Warm air through the ventilator, causes the metal strip e to contract and release the lever f,When the Weighted arm d will close said damper.

R designates an induct port, to provide for filling the system With Water, and s is an air vent to permit of the escape of air as said system is illed.

It will now be apparent, that, with but slight expense for fuel, an incubator of this construction, can be operated so as to malntain the same degree of heat in all portions of the incubatory chamber, thereby insuring a perfect result in the hatching of the eggs.

Having thus fully set forth my invention, what I claim as new, and desire to secure by Letters Patent, is-

In an incubator, the combination of the heater having the upper and lower watersecti0ns,the water chamber K communicating with said upper section, the Water tank, the partition dividing,r said tank from said chamber, the independent pipes in said tank, said pipes passing through said partition and communicating at one end with the upper water section, the other end of said pipes discharging into said tank, the pipe connecting the lower water section of the heater with said tank, and the pipe connecting said section with the chamber K.

In testimony whereof I aiix my signature in presence of two witnesses.

JAMES M.H. SPOONER. Witnesses:

E. S. WHEELER, E. K. ROEMER. 

